Prospect after discoveries of Higgs/SUSY. Yasuhiro Okada (KEK) “Discoveries of Higgs and Supersymmetry to Pioneer Particle Physics in the 21 st Century” November 25, 2005, Univ. of Tokyo. (1) Higgs Physics.
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Prospect after discoveries of Higgs/SUSY
Yasuhiro Okada (KEK)
“Discoveries of Higgs and Supersymmetry to Pioneer Particle Physics in the 21st Century”
November 25, 2005, Univ. of Tokyo
How we have come to understand the strong interaction.
(proton / neutron)
Discovery of the Higgs boson is similar to discovery of the Yukawa meson
in understanding the weak interaction.
the EW symmetry
A Higgs sector is unknown :
How many Higgs bosons? (is there any?)
What is the mass ?
What is SU(2) representation?
Even if one Higgs doublet model is a good description,
What is f?
What physics determines –m^2?
What physics determines l?
Different scenarios provides different answers.
SUSY, String Theory
Composite model, Little Higgs model
TeV scale extra dimension
Various new physics signals
are expected in the TeV
region, depending on different
Large Higgs mass Large self-coupling Strong dynamics
If we require that the SM is valid
up to 10^19 GeV,
Two interesting cases
(2) High mass Higgs boson (>300 GeV)
(1) Low mass Higgs boson (< 130 GeV)
M.Peskin and J.Wells
(mh< 135 GeV for MSSM)
Higgs potential is generated at
low energy scale (< 0(10) TeV )
Ex. Pseudo Nambu-Goldstone boson
Something is needed to be consistent
with the EW precision data.
0(10)% for ratio of the coupling constants
A few % for absolute values
of various coupling
Indirect constraint on the heavy Higgs boson mass in MSSM
at 1TeV LC
ACFA Higgs WG
S. Kiyoura, et al
SUSY loop contributions to the hbb Yukawa coupling
B(h->bb)/B(h->tt) nomalized by SM value
B(h->bb)/B(h->tt) is sensitive to
the SUSY loop correction to the
bottom Yukawa coupling for a
large tanb region.
M.Carena, D.Garcia, U.Nierste, C.E.M.Wagner
Access to the Higgs potential.
Precision at 1/ab for 120 GeV Higgs boson
~20% for 500GeV ILC
~10% for 1 TeV ILC
Y.Yasui, et al, LCWS 02
First order phase transition
Extension of the Higgs sector
The Higgs potential at zero temperature is also modified.
=> Self coupling measurement
Model with dim 6 potential
S.Kaenmura, Y. Okada, E.Senaha
SUSY + GUT => Gauge coupling unification
SUSY + R parity => Dark matter
SUSY + Seesaw neutrino => Leptogenesis
(Baryon number of the Universe)
After we confirm the supersymmetry, whether these ideas are realized
could be central issues.
G.A.Blair, W.Porod,and P.M.Zerwas
ALCPG cosmology subgroup
SUSY mass and coupling measurements
=> Identification of dark matter
Large Lepton flavor violation processes are expected.
m->eg in SU(5) SUSY GUT
with seesaw neutrino
Slepton flavor mixing
J.Hisano, M.M.Nojiri, Y.Shimizu, M.Tanaka
T.Goto,Y.Shimizu,T.Shindo,M.Tanaka and Y.Okada.